ul.category {
    @BG: #2a2a2a;
    position: absolute;
    width: 100%;
    top: 80px;
    left: 0;
    padding: 10px 50px;
    background-color: @BG;
    li {
        user-select: none;
          border-top: 1px solid lighten(@BG, 20%);
          &.active {
            color: red;
          }
    }
}